```html
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>推荐系统排序（CTR 预估）可视化解析</title>
    <link rel="stylesheet" href="https://cdn.staticfile.org/font-awesome/6.4.0/css/all.min.css">
    <link rel="stylesheet" href="https://cdn.staticfile.org/tailwindcss/2.2.19/tailwind.min.css">
    <link href="https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&family=Noto+Sans+SC:wght@300;400;500;700&display=swap" rel="stylesheet">
    <style>
        body {
            font-family: 'Noto Sans SC', Tahoma, Arial, Roboto, "Droid Sans", "Helvetica Neue", "Droid Sans Fallback", "Hiragino Sans GB", Simsun, sans-serif;
            background-color: #f8fafc;
            color: #1e293b;
            line-height: 1.6;
        }
        .hero-gradient {
            background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
        }
        .code-block {
            background-color: #1e1e2e;
            border-left: 4px solid #8b5cf6;
        }
        .concept-card {
            transition: all 0.3s ease;
        }
        .concept-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }
        .highlight-circle {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
        }
        .feature-icon {
            color: #8b5cf6;
        }
    </style>
</head>
<body>
    <!-- Hero Section -->
    <section class="hero-gradient text-white py-20 px-4 md:px-0">
        <div class="container mx-auto max-w-5xl flex flex-col items-center text-center">
            <div class="mb-6">
                <span class="inline-block px-4 py-1 bg-white bg-opacity-20 rounded-full text-sm font-medium">AI 推荐系统</span>
            </div>
            <h1 class="text-4xl md:text-5xl font-bold mb-6 font-serif">CTR预估与推荐排序</h1>
            <p class="text-xl md:text-2xl max-w-3xl opacity-90 leading-relaxed">
                探索深度学习如何精准预测用户点击行为，优化推荐系统排序策略
            </p>
            <div class="mt-10 flex items-center justify-center space-x-4">
                <div class="w-12 h-12 rounded-full bg-white bg-opacity-20 flex items-center justify-center">
                    <i class="fas fa-brain text-2xl"></i>
                </div>
                <div class="w-12 h-12 rounded-full bg-white bg-opacity-20 flex items-center justify-center">
                    <i class="fas fa-chart-line text-2xl"></i>
                </div>
                <div class="w-12 h-12 rounded-full bg-white bg-opacity-20 flex items-center justify-center">
                    <i class="fas fa-sort-amount-down text-2xl"></i>
                </div>
            </div>
        </div>
    </section>

    <!-- Main Content -->
    <div class="container mx-auto max-w-5xl px-4 md:px-0 py-16">
        <!-- Introduction -->
        <section class="mb-20">
            <div class="flex items-start">
                <div class="highlight-circle rounded-full flex items-center justify-center text-white text-2xl font-bold mr-6 flex-shrink-0">CTR</div>
                <div>
                    <h2 class="text-3xl font-bold mb-6 font-serif">点击率预估的核心价值</h2>
                    <p class="text-lg text-gray-700 mb-6">
                        在信息爆炸的时代，推荐系统通过精准的CTR(点击率)预估，为用户筛选最有价值的内容。这不仅提升了用户体验，也为平台创造了更大的商业价值。
                    </p>
                    <div class="bg-indigo-50 border-l-4 border-indigo-500 p-4 rounded">
                        <p class="text-indigo-800 font-medium">
                            <i class="fas fa-lightbulb text-indigo-500 mr-2"></i>
                            关键洞察：优秀的CTR排序算法能使推荐系统的整体效果提升30%-50%，直接影响用户留存和平台收益。
                        </